1. Load the tidyverse package first and then explore the diamonds dataset. What’s the average price of premium cut diamonds in the diamonds dataset?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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1. Load the tidyverse package first and then explore the diamonds dataset. What’s the average price of premium cut diamonds in the diamonds dataset?

 

2. Which is true about mutate() and transmute()? Select all the correct answers. Group of answer choices:

A. They both create new columns that are based upon existing columns.

B. mutate(flights, gain = dep_delay - arr_delay, speed = distance / air_time * 60)

and

transmute(flights, gain = dep_delay - arr_delay, hours = air_time / 60, gain_per_hour = gain / hours)

returns the same output.

C. If you only want to keep the new variables that you have created, use transmute() instead of mutate(). 

 

No hand written and fast answer with explanation 

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